Flow cell and gas analyzing device having the same

Abstract

A flow cell has a tubular main body and a thermocouple. An internal space is formed in the main body, a plurality of opening portions allowing the internal space to communicate with an external portion is formed in a peripheral wall, and sample gas flowing from at least one of the plurality of opening portions passes through the internal space and flows out of the other opening portion. The thermocouple includes two metal wires which are integrally attached to the main body, and a joint part of the two metal wires is provided in the vicinity (proximate) of the opening portion closer to an upstream side of the sample gas in a distributing direction than a center axis line of the main body.

What is claimed is: 
     
         1 . A flow cell, comprising:
 a tubular main body in which an internal space is formed in the main body, a plurality of opening portions allowing the internal space to communicate with an external portion are formed in a peripheral wall of the main body, and a sample gas flowing from at least one of the plurality of opening portions passes through the internal space and flows out of the other opening portion; and   a thermocouple which includes two metal wires integrally attached to the main body, and in which a joint part of the two metal wires is provided proximate the opening portion closer to an upstream side of the sample gas in a distributing direction than a center axis line of the main body.   
     
     
         2 . A flow cell, comprising:
 a tubular main body in which an internal space is formed in the main body, a plurality of opening portions allowing the internal space to communicate with an external portion is formed in a peripheral wall, and sample gas flowing from at least one of the plurality of opening portions passes through the internal space and flows out of the other opening portion; and   a plurality of thermocouples, each of which includes two metal wires integrally attached to the main body, and in which joint parts of the two metal wires are provided in the vicinity of the plurality of opening portions at different angular positions in relation to the center axis line of the main body.   
     
     
         3 . A gas analyzing device, comprising:
 the flow cell, according to  claim 1 ;   a light source portion which irradiates light to the internal space of the flow cell;   a light receiving portion which receives the light that has passed through the internal space of the flow cell; and   a control portion which carries out an arithmetic operation on the basis of a light receiving intensity of the light receiving portion and a thermal electromotive force of the thermocouple.   
     
     
         4 . A gas analyzing device, comprising:
 the flow cell, according to  claim 2 ;   a light source portion which irradiates light to the internal space of the flow cell;   a light receiving portion which receives the light that has passed through the internal space of the flow cell; and   a control portion which carries out an arithmetic operation on the basis of a light receiving intensity of the light receiving portion and a thermal electromotive force of the thermocouples.